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RESEARCHES ON FUNGI 



the drying of the cell-sap ; No. 2, the gelatinous ring which causes 

 the sporangium to adhere tightly to its substratum ; No. 3, the 

 paler peripheral part of the cap-like portion of the sporangium-wall, 

 now flattened, radially spUt, and in part fragmented ; No. 4, the 

 intensely black convex main part of the cap-like portion of the 



Fig. 34. — Piloholus longipes. Photomicrograph of the upper side 

 of another discharged sporangium and of the drop of cell-sap 

 (now dried) which accompanied it. No. 1, the precipitate of 

 the cell-sap ; No. 2, a broad clear ring-layer of jelly in contact 

 with the glass ; No. 3, the peripheral part of the sporangium - 

 wall, now flattened and broken and overlying the jelly ; No. 4, 

 the convex, very black, main portion of the sporangium-wall 

 covering many thousands of spores ; No. 5, a few isolated spores 

 lying under the jelly ; they were forced out of the sporangium 

 when this struck the glass. Magnification, 51. 



sporangium- wall, which covers and hides many thousands of spores ; 

 and No. 5, a few spores which, owing to the violence with which the 

 projectile impinged on a rigid piece of glass, were pressed out of the 

 sporangium between the wall and the gelatinous ring. 



A lower view of a projectile obtained through a cover-glass to 

 which the projectile is attached is shown in Fig. 35. Here one can 

 distinguish : No. 1, a precipitate of amorphous granules and large 

 branched crystals produced by the drying-up of the cell-sap ; No. 2, 

 the gelatinous ring, the outer hmit of which is more easily seen here 



